Three-dimensional printer



FIG. 1 is a front, right side perspective view of a first embodiment of a three-dimensional printer according to our new design;

FIG. 2 is a front elevation view thereof;

FIG. 3 is a rear elevation view thereof;

FIG. 4 is a left side elevation view thereof;

FIG. 5 is a right side elevation view thereof;

FIG. 6 is a top plan view thereof;

FIG. 7 is a bottom plan view thereof;

FIG. 8 is a top, front, right side perspective view of a second embodiment of the three-dimensional printer;

FIG. 9 is a front elevation view thereof;

FIG. 10 is a rear elevation view thereof;

FIG. 11 is a left side elevation view thereof;

FIG. 12 is a right side elevation view thereof;

FIG. 13 is a top plan view thereof; and,

FIG. 14 is a bottom plan view thereof.

The dot-dash broken lines and dash-dash broken lines immediately adjacent to the shaded areas depict the bounds of the claimed design and form no part of the claimed design. All other dash-dash broken lines depict portions of the three-dimensional printer that form no part of the claimed design.

The oblique line shading represents transparency. 

CLAIM The ornamental design for a three-dimensional printer, as shown and described. 